html, body, ul, li, span, p, h1, h2, h3, h4, h5, h6, i, a, b, div{
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-weight: 400;
  font-style: normal;
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-decoration: none;
  list-style-type: none;
}
.float-left{
  float: left;
}
.float-right{
  float: right;
}
.clear-float:after{
  content: "";
  display: block;
  clear: both;
}

/*滚动条整体样式*/
html ::-webkit-scrollbar,
body ::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
/*滚动条里面小方块*/
html ::-webkit-scrollbar-thumb,
body ::-webkit-scrollbar-thumb {
  border-radius: 8px;
  background: #ecf0f1;
}
html ::-webkit-scrollbar-thumb:hover,
body ::-webkit-scrollbar-thumb:hover {
   background: #bdc3c7;
 }
/*滚动条里面轨道*/
html ::-webkit-scrollbar-track,
body ::-webkit-scrollbar-track {
  border-radius: 8px;
  background: #fafafa;
}












